Cast
Michael Hordern
Lab Director Owens
John Horsley
Customs Officer
Margaret Lockwood
Frances Gray
Ernest Butcher
Tom - Lab Assistant (uncredited)
Noel Johnson
Frank Conway (uncredited)
John G. Heller
Soldier at Station Check Point (uncredited)
Dinah Sheridan
Train Passenger at Checkpoint (uncredited)
Olaf Pooley
Detective-Interrogator
Gladys Henson
Attendant
Sam Kydd
Customs Man (uncredited)
Dane Clark
Bill Casey
Naunton Wayne
Mr. Hedgerley
Jill Balcon
Wardress (uncredited)
Richard Marner
Soldier on Train (uncredited)
Eric Pohlmann
Joe - the bartender
Patric Doonan
Customs Man
Anton Diffring
Officer at Station (uncredited)
Anthony Newley
Operator (uncredited)
Wilfrid Hyde-White
Mr. Luke
Eugene Deckers
Alf
Paul Hardtmuth
Priest
George Benson
Sandwich Stand Customer
John Gabriel
Night Field Telephone Officer (uncredited)
Philo Hauser
Waiter (uncredited)
Marius Goring
Commandant Anton Razinski
Ewen Solon
Enemy Scientist (uncredited)
Emile Stemmler
Soldier at Station Checkpoint (uncredited)